TREA

Michael E. Schramm

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  • El Toro, CA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Rock bit cone retention
    • Patent number 4,506,997
    • Issue date Mar 26, 1985
    • Smith International, Inc.
    • Michael E. Schramm
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Rock bit cone retention means
    • Patent number 4,444,518
    • Issue date Apr 24, 1984
    • Smith International, Inc.
    • Michael E. Schramm
    • E21 - EARTH DRILLING MINING